Sectional boiler with superheater



July 18, 1950 I w. KNOX 2,516,057

SECTIONAL BOILER WITH SUPERHEATER Filed June 14, 194? LIQUID LEVEL .MAINTAINING MEANS v INVENTOR William final 49 ATTORNEY MAINTAINED LEvELj superheat Patented July 18, 1950 UNI-T ED STAT ES AT ENT OFFICE i SEQTIQNAL BOILER WITH SUPERHEATER William Knox, ersey City, N. J. Application lune 14, 1947, Serial No. 754,740

tion and the at to th steam out e of the o r.

ther by to .pr vethc ua ity f. t e am or r, ,perationa econo eslmother b ect, Q ve tion. to, rc e a sin le block. section adap ed. for at achm n to an ntermediate section. of. con entional ticnal low pressure steam oil and, pro in the steam utlet r e o ler n con n steam d its. for condu tin the steam en ra ed n the boilerfrom the eam spac through a conduit means or manifold exposed to the p odu tscf comb on a d then e to h steam outlet; whereby, in order to convert a convent nal sect onal, W pres ure steam boiler in one capable oi prcducing steam of high quality, all that is required to be done is to sub.- st ute th proved block section for the end block section of the conventional sectional boiler. The improved block section embodies substantially integrally associated steam passageways and attached conduit means or manifold communicating with the passageways and arranged for extension into the combustion space or firebox.

A further object of the present invention is to provide for the maki Qf some steam when a minimum amount of heat is being supplied, for example, when the fire is banked for the night in a conventional residence installation. Under such circumstances it is desirable that some steam be supplied to the radiation system to prevent the house getting too cold. The present invention further provides a water-containhe header m an nr ierablv ar an d below the steam conducting conduit means or manifold hereinabove described, and which is close to the place in the boiler Where the heat is generated, as close over the normalposition for a fuel bed. Thus it provides for the steady generation of a small amount of steam, even with a small or minimum generation of heat and with a minimum combustion rate of fuel.

Other objects of the invention will appear from the following explanation of the principle 2 Claims. (o1.122 225) of the nv ntion a d e be modem which I have contemplated applying that principle.

lnth d aw e Fig. l is a perspective View of a domestic type sectional steam boiler embodying a single end block section of the present invention;

Fig. 2 is a horizontal section substantially on line 2-2. of Fig. 1; i

Fig. 3 is a fragmentary vertical section on line 3-3 of Fig. 2; Fig. 4 is a fragmentary vertical section on line 4- of Fig. 2; and i Fig. 5 is a showing, in vertical section, of a modified form of the invention comprising a waterecontaining header means in communication with the end block section and the steam manifold.

As in the usual case of a sectional steam boiler,

intermediate sections l, 2, 3, 4, 5., ii, etc., in the desired number, are joined together in series arrangement with their water and steam spaces respectively connected together. The front end block section I is provided with the usual firebox door 8, cleaning doors 9 and ID and ash pit door I l. The rear end blocksection in the con.- ventional sectional boiler usually has a water inlet, a steam outlet, and an opening for the discharge of products of combustion, All of the sections are held in assembled relationship by tie-rods, such as tie-rods l2 and I3. The vertical and top portions of the intermediate sections and the greater portions of the end block sections are hollow for containing water and steam as is well understood. The inner Walls of the assembled section enclose a firebox which may be provided with a grate i l should solid fuel be used. The intermediate sections are commonly provided with hollow crossing auxiliary portions !5, [6, it, etc., below the water line and above the firebox or combustion chamber.

In the steam boiler of the present invention the customary intermediate and front end block sections are utilized, as, for example, of the type hereinabove described, or of equivalent types. The rear end block section I8, though having a 'hollowivall enclosing a water space It! and a 3), a conduit means or manifold 24 (Figs. 1 and 2), a cored passageway 25 through the double wall of the end block section 18, and a vertical passageway 26 discharging to a steam delivery outlet and riser 21 (Fig. 4). Passageways 2|, 23, 25 and 26 may be and preferably are cast integrally with the rear end block section I8. Each of vertical passageways 2| and 26 is provided with an opening 28, 29, which is normally closed by a plug, whereby the headers of the conduit means or manifold 24 may be cleaned.

The conduit means or manifold 24 is supported by the end block section l8 and i so disposed as to extend into the firebox of the boiler or in external contact with the products of combustion. The manifold is removably fastened to nipples 30 and 3| which are threaded into passageways 23 and 25, respectively. The nipples are coupled to headers 32 and 33, respectively, by dis-connectable flanged couplings. The conduit means or manifold 24 includes the headers :32 and 33 which are closed at their ends at 34 and 35 respectively and are connected together by a number of tubes 36, 31 and 38 through which the steam travels from header 32 to header 33. The nipples, headers 'and tubes of the conduit means or manifold 24 are made of wrought iron or steel and the tubes are joined to the headers by welded connections.

The conduit means or manifold 24 is preferably located above the source of heat; and all of the steam generated in the boiler is thereb subjected to radiation as well as to the products of combustion rising from the bed of fire or flame before delivery to the riser. The end block section is may be provided with a tapped hole 39 for receiv ing a feed water pipe 40, and with a suitable flue opening 4 I In Fig. 5 thereis illustrated a modified form of the invention in which the heating surface of the boiler is increased by providing a water-containing header means 42 immediately below a steam header 43 which latter corresponds generally to the conduit means 24. The headers 42 and 43 are connected by tubes 44 and 45 which are welded to the respective headers. The watercontaining header means 42 is coupled to a nipple 46 which is engaged in a cored passageway 41, cast in the rear end block section 48. Block section 48 corresponding generally to the end block section I'B of the preceding figures also has a water outlet 49, which is connected by a pipe 50 to a float level control valve means 5| and thence to passageway 41, whereby the water-containing header means 42 is kept filled with water automatically. Normally the controlled level of water would be such as to fill the water-containing header means and no higher. Any suitable type of level maintaining means, many of which are known to the art, may be used as the level control valve means 51. The details of this means form no part of the present invention.

The water-containing header means 42 is situated close to the source of heat in the boiler and it is therefore capable of generating steam even though the fire be banked at night, as is customarily done in a residential installation. Even. though only a minimum amount of heat is being maintained in the boiler, the apparatus shown in Fig. 5 will provide some steam to the heating system and prevent the house from getting too cold.

Preferably, the water-containing header means 42 is connected to the steam header 43, which is in 'a position corresponding to steam header 32 in the arrangement shown in Figs. 1 to 4, inclusive. The steam conduit means or manifold used in conjunction with the water-containing header means 42, functions in the manner hereinabove described. Auxiliary brackets may be provided, if desired and in a manner not particularly illustrated, for contributing to the support of the conduit means or manifold and water-containing header means 42.

What is claimed is: t

1. In a domestic type, sectional steam boiler, in combination, a single section providing a water space and a steam space communicating therewith, said spaces being contiguous to one another at a water line, said single section being adapted to cooperate with a plurality of other sections together making up such boiler and providing a combustion space and a passage for products of combustion therefrom, a steam header arranged to be in contact externally with products of combustion generated in said combustion space and connected to and supported at least in part by said single section, said steam header serving to conduct vapor and steam from an inlet to an outlet therefor, means connecting the steam space of said single section above the water line with the inlet to said steam header, means connecting said outlet of said steam header to asteam delivery outlet from said boiler, a water-containing header means exposed externally to the products of combustion in said boiler and located at a level lower than that of said steam header, said water-0on taining header means communicating with the water space of said boiler below the water :level thereof, means for conducting water into said water-containing header means from the water space of said boiler, said water-conducting means including control means to maintain a water level in said water-containing header means and at a predetermined point below said steam header, and means connecting said water-containing header means with said steam header.

2. A steam generating and heating unit for a sectional boiler, comprising, in combination, an end block section providing a water space and a steam space, a steam header arranged to be in contact externally with products of combustion, connected to said end block section and serving to conduct vapor and steam from an inlet to an outlet therefor, means connecting the steam space of said end block with the inlet to said steam REFERENCES CITED The following references are of record in the file of this patent: y

UNITED STATES PATENTS Number Name Date 857,060 Heizmann June 18, 1907 1,380,536 Davis June 7, 1921 1,481,883 Badenhausen Jan. 29, 1924 1,636,230 Hontsch July 19, 1927 1,662,460 Keenan, Jr Mar. 13, 1928 

